in order to determine the exact birth rate and also percent of birth - orders in all births in the province of west azerbaijan, all centres of birth registration in the province were asked to fill a questionnaire at the time of issuing identity document for children. in the questionnaire, parents were asked to mention the place of birth, sex and birth order of the children and also the occupati...

the aim of this study was to determine the trend of changes in cataract surgical rate (csr) in the provinces of iran during 2006 to 2010 and identify high risk areas.this report is part of the national iranian csr study. the percentage change in csr in 2010 compared to 2006 was conducted in each province, retrospectively. one hundred and ten centers were chosen from all provinces, to determine ...

tuberculosis is a continuous threat for health in all parts of the world. an estimated one-third of the world, s population is infected with the mycobacterium tuberculosis and 7 to 8 million people develop tb disease each year. the purpose of this study was to investigate the rate of tuberculosis in the townships of yazd province, iran. during the study period (1997-1999), 3885 suspected tuberc...

head louse infestation is common in various parts of the world. baluchestan area in southeast of iran is one of the most infected areas. we studied the head louse infestation among the girls in primary schools of iranshahr, which is the largest city of the province during november 2002 to may 2003. totally 918 pupils, between 6-14 years old from 12 urban primary schools were randomly selected b...

abstract according to the importance of date export in iran, this study investigates short run and long run relationship between date export and important economical variable, specifically exchange rate. for this purpose, an autoregressive distributed lag approach (ardl) to cointegration is applied to annually time-series data from 1981 to 2007. results showed that the exchange rate, export pri...

background: ionizing radiation is present in all environment of the earth’s surface, beneath the earth and in the atmosphere. human beings are exposed to external radiation from their surroundings naturally and also to internal radiation from food, water and air they consume. then, it is important to measure and develop knowledge about radiation. objective: this study is designed to evaluate th...

background: despite the widespread use of respiratory protection equipment in different jobs, the effects of these devices on people’s physiological responses are not well recognized as yet. therefore, the aim of this study is to evaluate the effect of the air purifying respiratory protection equipment on the heart rate. methods: this experimental study was performed in a climate chamber under ...